Apparatus for polishing metal ribbon



(No Model.)

2 Sheets-Sheet 1;

J. LOGAN.

APPARATUS FOR POLISHING METAL RIBBON.

WIF EE 5E5 Patented Oct. 13, 1885.

(No Model.) 2 Sheets-Sheet 2.

J.LOGAN APPARATUS FOR POLISHING METAL RIBBON. No. 328,125; Patented 001;. 13, 1885.

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UNITED STATES PATENT OFF CE.

JOHN LOGAN, OF WALTHAM, MASSACHUSETTS.

APPARATUS FOR POLISHING METAL RIBBON.

SPECIFICATION forming part of Letters Patent No. 328,125 dated 0ctober 13, 1885.

Application filed October 13, 1884. Serial No. 145,384.

To all whom it may concern:

Be it known that I, JOHN LOGAN, of Waltham, county of Middlesex, State of Massachusetts, have invented an Improvement in Apparatus for Polishing Metal Ribbon, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

My invention relates to an apparatus for polishing upon both sides metal band or ribbon, such as employed for springs for watches or clocks, or for other similar purposes.

The invention is embodied in an apparatus in which the metal ribbon is drawn or fed from a spool or reel, and passes alternately under and over a series of polishing-wheels provided with suitable polishing material, the alternate wheels operating upon the opposite sides of the ribbon, which is finally wound upon another spool or reel. The ribbon or surface to be polished is caused to travel back and forth laterally with relation to the polishing-surface of the wheels, which are wider than the ribbon, so as to insure a proper polishing action, and also to prevent the ribbon from wearing grooves in the wheels.

Figure 1 is a side elevation of an apparatus for polishing metal ribbon embodying this in vention; Fig. 2, an end elevation thereof, and

Fig. 3 a detail of the guide by which the rib-.

icon is caused to move laterally.

The spool or reel a, upon which the ribbon to be polished is wound, is provided with a friction device, shown as a weighted strap, a, passing over a hub or pulley, a", connected with the said spool a, and the ribbon shown at b is led, as it unwinds from the said spool a, alternately under and over a series of polishingwheels, 0 c, the surfaces of which are provided with suitable polishing materialsuch as emery or corundum of various grades of finenessthe wheels more remote from the spool a having the finest material, to produce theultimate finish on the surface of the ribbon. The polishing-wheels c c are arranged in two parallel rows, being mounted on opposite ends of shafts d, provided with pulleys e, actuated by suit able belts, f, and the ribbon b is led from the polishing-wheels c at one end of the shafts d to the polishing-wheel c at the other end of the Said shafts, over guide pulleys or rollers g, and

(No model.)

after the ribbon has passed the entire series of wheels 0 c it is wound upon a reel or spool, h, on a shaft, 72., provided with a worm-gear, h actuated by a worm, 72/ rotated by a pulley, if, and belt 71., driven by the pulley h on a shaft, t, actuated by a belt, i, the said devices constituting feeding mechanism for moving the ribbon longitudinally over the polishing-wheel. The said polishing-wheels are provided with flanges at their sides to prevent the ribbon from running ed, and the polishing'surface between the said flanges is wider than the ribbon b, which is caused to move laterally to and fro between the said flanges, in order to be acted upon by the entire surface of the wheel, and in orderto slightly vary the direction of the movement of the polishing-surface with relation to the surface of the ribbon to be polished as the said ribbon moves longitudinally over the said polishing-surface, so as to produce a better finish. The ribbon is thus caused to move laterally with relation to the polishing-wheelsby guides k k at opposite ends of a bar, m, mounted on an arm, m, on a rock-shaft, it, provided with a crank, 0, connected by a link, 0, with a crank or wrist-pin, p, on a shaft, 1), rotated by a belt, 12 from a pulley, p on the shaft 1', that forms part of the ribbon-feedingmechanism.

In operation, the friction device a produces a tension on the ribbon, by which it is caused to bear with sufficient pressure against the polishing-wheels, over which it is drawn by the rotation of the spool h by the feeding mechanism, the alternate polishing-wheels acting on the opposite side of the ribbon, which is at the same time caused to move to and fro laterally on the polishing-wheels, the ribbon thus being polished with great rapidity.

It is obvious that the polishing-wheels might be made to move laterally with relation to the ribbon being polished, which might have only the longitudinal feeding movement, the essential feature of this part of the invention being that there is a slight to-and-fro lateral movement of the surface being polished with relation to the polishingsurface, so that the paths of the polishing particles on the surface being polished intersect instead of being always parallel.

I claim- 1. In an apparatus for polishing metal band IOU the said band or ribbon longitudinally over the said wheels, and the guides to move the said band or ribbon laterally with relation to the said wheels, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN LOGAN.

Witnesses:

J 0s. 1?. LIVERMORE, W. H. SIesroN. 

